regular

accurate accustomed accepted amicable average blank businesslike changeless certain characteristic common commonest conformable constant continual continuous conventional correct customary cyclical daily dull dull duller duller equable even faithfully formal frequenter general good gradational gradual habitual habitué horizontal innate instinctual instinctive intimate invariant invariable isochronous isochronal judicial just legitimate level mainstream measured methodic methodical/methodic methodical monochromatic more correct more constant more accurate more even more formal more certain more normal more methodic more methodic more readable more methodical more methodical more solid more orderly more prevalent more natural more uniform most certain most correct most methodic most methodic most methodical most methodical most punctual natural neat neater neatest normal old school old-school orderly pandemic paradigmatic periodic plane planar prevailing prevalent prototypical prototypic prototypal punctual readable recurrent run-of-the-mill round-the-clock routine sequential set shapely sincere sincerest smoothest smooth smoother sociable solid standing stated steady-going steady steady step-by-step stocker stock stuporous symmetric symmetrical systematical systematic through time-honored traditional trig truest truer true typic typical unbroken uniform universal unremitting unwavering usual virtuous veridical wonted